Sharp Aquos Zero vs vivo X21

Compare recorded specifications, size and practical differences.

Sharp Aquos Zero

Replace Aquos Zero

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vivo X21

Replace X21

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Key differences

Calculated from recorded specifications using minimum difference thresholds. These are differences, not an overall ranking. For three phones, numeric highlights compare the two extremes.

WeightAquos Zero: 10.2 g lighterAquos Zero: 146 g · X21: 156.2 g
WidthAquos Zero: 1.8 mm narrowerAquos Zero: 73 mm · X21: 74.8 mm
ChipsetQualcomm SDM845 Snapdragon 845 (10 nm) / Qualcomm SDM660 Snapdragon 660 (14 nm)Aquos Zero: Qualcomm SDM845 Snapdragon 845 (10 nm) · X21: Qualcomm SDM660 Snapdragon 660 (14 nm)
Rear camera layoutSingle / DualAquos Zero: Single · X21: Dual
DepthX21: 1.4 mm thinnerX21: 7.4 mm · Aquos Zero: 8.8 mm
Release year2019 / 2018Aquos Zero: 2019 · X21: 2018

Physical size

Relative size, not calibrated actual size. Front and side outlines share one scale and a bottom baseline. Generic outlines use recorded body dimensions, excluding camera bumps.

Front

Side

1. Aquos Zero
Height
154 mm
Width
73 mm
Depth
8.8 mm

Weight
146 g
2. X21
Height
154.5 mm
Width
74.8 mm
Depth
7.4 mm

Weight
156.2 g

Specifications

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Everyday essentials

Everyday essentials
Specification	Aquos Zero	X21
Dimensions (HxWxD)	154 Х 73 Х 8.8 mm	154.5 Х 74.8 Х 7.4 mm
Weight	146 g	156.2 g
Technology	OLED	Super AMOLED
Screen size	6.2" inch	6.28" inch
Screen resolution	1440 x 2992 px	1080 x 2280 px
Internal memoryRecorded storage / RAM variants. Entries are alternatives, not a combined maximum. Ambiguous formats stay as recorded.	128 GB 6 GB RAM	64/128 GB 6 GB RAM
Memory card support	No	microSD up to 256 GB (uses SIM 2 slot)
BatteryCapacity is not battery life. No endurance test is implied.	3130 mAh Non-removable Li-Ion	3200 mAh Non-removable Li-Ion
Operating system OS	Android 9.0 (Pie)	Android 8.1 (Oreo); Funtouch 4
Chipset	Qualcomm SDM845 Snapdragon 845 (10 nm)	Qualcomm SDM660 Snapdragon 660 (14 nm)
NFC	Yes	Unknown
Headphone jack	No	Yes

Display

Display
Specification	Aquos Zero	X21
Touchscreen	capacitive touchscreen	capacitive touchscreen
Display colors	16M	16M
Screen area	96.9 cm2	98.4 cm2
Screen format	18.7:9 (height:width)	19:9 (height:width)
Screen to body ratio	86.2%	85.2%
PPI /points per inch/	536 PPI	402 PPI
Screen protection	Corning Gorilla Glass 5	Unknown

Camera and Video

Camera and Video
Specification	Aquos Zero	X21
Rear camera, main	22.6 MP Single	12 MP Dual
Camera specs	22.6 MP f/1.9 22 mm PDAF OIS	12 MP f/1.8 1/2.55'' 1.4µm dual pixel PDAF -5 MP f/2.4 depth sensor
Functions	HDR	LED flash HDR panorama
Video	1080p@30fps	1080p@30fps
Front camera, selfie	8 MP Single	12 MP Single
Specifications	8 MP f/2.2 23 mm	12 MP f/2.0

Performance

Performance
Specification	Aquos Zero	X21
Processor CPU	Octa-core (4x2.6 GHz Kryo 385 Gold & 4x1.7 GHz Kryo 385 Silver)	Octa-core (4x2.2 GHz Kryo 260 & 4x1.8 GHz Kryo 260)
Graphics processor GPU	Adreno 630	Adreno 512
Antutu 7 scoreLegacy recorded score. Test conditions are unspecified; no new testing is implied.	275122	143728
GeekBench 4 Single CoreLegacy recorded score. Test conditions are unspecified; no new testing is implied.	Unknown	1806
GeekBench 4 Multi-CoreLegacy recorded score. Test conditions are unspecified; no new testing is implied.	Unknown	4240

General specs

General specs
Specification	Aquos Zero	X21
Release date	2019 January	2018 March
Colors	Meteorite black	Black Aurora White Ruby Red
Historical recorded priceLegacy catalogue value; date unknown. Not a current offer.	600 EUR	450 EUR
Body build	Front glass aluminum frame	Front glass aluminum body

Communication and Connectivity

Communication and Connectivity
Specification	Aquos Zero	X21
SIM card	Nano-SIM	Hybrid Dual SIM (Nano-SIM dual stand-by)
Network	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 -3G - HSDPA 900 / 2100 -4G - LTE band 1(2100) 3(1800) 7(2600) 8(900) 28(700) 38(2600)	Show all network frequencies: -2G - GSM 850 / 900 / 1800 / 1900 - SIM 1 & SIM 2 CDMA 800 & TD-SCDMA -3G - HSDPA 850 / 900 / 1900 / 2100 -4G - LTE band 1(2100) 2(1900) 3(1800) 5(850) 8(900) 34(2000) 38(2600) 39(1900) 40(2300) 41(2500)
Speed	HSPA 42.2/5.76 Mbps LTE-A (3CA) Cat15 1024/50 Mbps	HSPA 42.2/5.76 Mbps LTE-A (2CA) Cat6 300/50 Mbps
GPRS	Yes	Yes
Edge	Yes	Yes
Wi-Fi	Wi-Fi 802.11 a/b/g/n/ac dual-band WiFi Direct hotspot	Wi-Fi 802.11 a/b/g/n/ac dual-band WiFi Direct hotspot
GPS	Yes with A-GPS GLONASS GALILEO QZSS	Yes with A-GPS GLONASS
USB	2.0 Type-C 1.0 reversible connector (PowerDelivery 2.0)	microUSB 2.0 USB On-The-Go
Bluetooth	5.0 A2DP LE	5.0 A2DP LE

Music and Audio

Music and Audio
Specification	Aquos Zero	X21
Radio	No	FM radio
Others	DCI-P3 -HDR 10 -Dolby Vision Active noise cancellation with dedicated mic -24-bit/192kHz audio -Dolby Atmos	32-bit/192kHz audio -Active noise cancellation with dedicated mic

Other features

Other features
Specification	Aquos Zero	X21
Dop	Sensors Fingerprint (rear-mounted) accelerometer gyro proximity compass - Fast battery charging - IP68 dust/water proof (up to 1.5m for 30 mins)	Sensors Fingerprint (rear-mounted) accelerometer proximity compass - Fast battery charging