Garmin fēnix 5S vs Garmin Forerunner 735XT

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

fēnix 5S compared with Forerunner 735XT
Garminfēnix 5SGarminForerunner 735XT
Overview
ReleasedMarch 2017May 2016
Display
Case sizes42 mm44.5 mm
Panel–Memory-in-pixel
Always-on displayYesYes
Display detailAlways-on transflective colour Garmin Chroma display, 1.1 inches (27.94 mm), 218 × 218 pixels, with LED backlight and button controls.1.23-inch (31.1 mm) sunlight-readable semi-round colour MIP display, 215 x 180 pixels, with button controls.
Health and fitness
ECGNoNo
Blood oxygenNoNo
Skin temperatureNoNo
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandSingle-band
Water resistance100 m (better)50 m
SensorsGPS, GLONASS, Garmin Elevate optical wrist heart rate, barometric altimeter, three-axis compass, gyroscope, accelerometer and thermometer.GPS, GLONASS, Garmin Elevate wrist heart rate and accelerometer.
Health features–All-day heart rate, steps, calories and sleep tracking.
Fitness featuresRunning, cycling, pool and open-water swimming, skiing, golf and paddle-sport profiles; training status, aerobic and anaerobic training effect, VO2 max estimates, recovery advice and race prediction. Additional running dynamics require a compatible chest strap.Running, cycling, pool and open-water swimming, triathlon, hiking and skiing profiles; auto multisport switching, VO2 max estimate, race predictor and recovery advisor. Detailed running dynamics need an HRM-Run or HRM-Tri strap; underwater heart rate needs an HRM-Swim or HRM-Tri strap.
Safety featuresCourse navigation, breadcrumb trails, TracBack and waypoint guidance; no preloaded detailed maps. Connected LiveTrack and GroupTrack require a paired phone.–
Battery and connections
Battery life (maker's claim)Up to 9 daysUp to 11 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Battery life detailUp to nine days in smartwatch mode, twelve hours in GPS mode or twenty-eight hours in UltraTrac with wrist heart rate on, according to the Singapore specification; the European launch release quotes fourteen hours GPS and thirty-five hours UltraTrac.Up to 11 days in watch mode with activity, notifications and optical heart rate; 14 hours in GPS activity mode with optical heart rate, or 24 hours in UltraTrac without it.
ChargingRechargeable lithium-ion battery with USB charging/data cable.Rechargeable lithium-ion battery with charging/data clip.
ConnectivityBluetooth and ANT+, smartphone notifications, Garmin Connect uploads, Connect IQ apps and phone music controls. Wi-Fi is included in Sapphire editions.Bluetooth and ANT+; smart notifications, Garmin Connect, Connect IQ, LiveTrack through a paired phone and phone music controls.
Storage64 MB total, with 37 MB available; up to 1,000 waypoints, thirty routes and 200 hours of activity data.Stores 80 hours of activity history.
Design
Weight (lightest version)67 g40.2 g (better)
SoftwareGarminGarmin
Case materialsStainless-steel bezel, buttons and rear case; 10 ATM water rating. Sapphire-glass editions available.Silicone band and 5 ATM water rating.
Size42 × 42 × 14.5 mm; 67 g with silicone band.44.5 x 44.5 x 11.9 mm; 40.2 g.
BandsQuickFit interchangeable bands.–
ColoursWhite model pictured; other case and band colours and Sapphire editions available.Black case and band.

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