Equivalence
iPhone = Nexus One (metal, nearly same thickness and dimensions)
iPhone 3G/3Gs = Nexus S/Galaxy Nexus (plastic)
iPhone 4/4s = Nexus 4 (glass)
iPhone 5/5s = Nexus 5
iPhone 6 / 6 Plus = Pixel / Pixel XL (ugly antenna lines)
iPhone 5c = Nexus 5X? (nah, 5X improved the 5. The 5X is more like a 5s/SE of the Nexus 5.)
iPhone 7 / 7 Plus = Pixel 2 / 2 XL (Bye, headphone port. Added IP rating and dual front speakers.)
Hard to find an iPhone equal to 6P.
iPhone OS 1-3 = Android 1-3 (except Android was still like 5 years behind iOS even if it came 15 months afterwards)
iOS4 = Android 4.0 (ICS)
iOS5 = Android 4.1 (JB)
iOS6 = Android 4.4 (KK)
iOS7 = Android 5.0 (L)
iOS8&9 = Android 6 & 7 (MM & N)
iOS10 = Android 8?
iOS11 = n/a (Oreo isn't that bad)
The #4 is bad luck to Asian markets but not with software. Think of Android from 1-3 as adolescence.
ICS was puberty. JB and KK are juniors and seniors in high school. Lollipop is freshman college. Marshmallow / Nexus 6P (2015) is when it hit adulthood at 21 when you can gamble and buy alcohol.
Expandable storage -
Nexus One
Removable battery -
Nexus One
Nexus S
Galaxy Nexus
Fast charging -
Nexus 6
Pixel / Pixel XL
Pixel 2 / Pixel 2 XL
5X / 6P charged fast enough.
Wireless charging -
Nexus 4
Nexus 5
Nexus 6
Headphone port -
Nexus One through Pixels (2016)
MicroUSB -
Nexus One through Nexus 6
USB-C
5X/6P through Pixel 2 / 2 XL
LCD -
Nexus One (some), 3.7"
Nexus 4, 4.7"
Nexus 5, 4.95"
Nexus 5X, 5.2"
OLED -
Nexus S, 4"
Galaxy Nexus, 4.65"
Nexus 6, 5.96"
Nexus 6P, 5.7"
Pixel / Pixel XL, 5"/5.5"
Pixel 2 / Pixel 2 XL, 5"/6"
Dual front speakers -
Pixel 2 / Pixel 2 XL
IP67 rating -
Pixel 2 / Pixel 2 XL
RAM -
Nexus One, 512 MB
Nexus S, 512 MB
Galaxy Nexus, 1 GB
Nexus 4, 2 GB
Nexus 5, 2 GB
Nexus 5X, 2 GB
Nexus 6, 3 GB
Nexus 6P, 3 GB
Pixel / Pixel XL, 4 GB
Pixel 2 / Pixel 2 XL, 4 GB
Best value, IMO -
Nexus 5, $299
Nexus 4, $299
Nexus 5X, $379
Galaxy Nexus, $399
Nexus 6P, $499
Nexus S, $529 (had subsidizing)
Nexus One, $529
Nexus 6, $649
Pixel 2, $649
Pixel, $649
Pixel XL, $769
Pixel 2 XL, $849
Cameras that didn't suck -
Nexus 6P
Pixel / Pixel XL
Pixel 2 / Pixel 2 XL
Displays that didn't suck -
Nexus 6P
Pixel / Pixel XL
Pixel 2
Battery life that didn't suck -
Nexus 6P
Pixel / Pixel XL
Pixel 2 / Pixel 2 XL
Best design, IMO
1. Nexus One
2. Nexus 6P
3. Pixel 2 XL (panda or black)
4. Nexus 4
5. Galaxy Nexus
6. Nexus 6
7. Nexus S
8. Nexus 5X
9. Pixel 2
10. Pixel / Pixel 2 XL
2018 Pixels? Newer design with taller display but will keep the trademark back and hopefully 6 GB of RAM to match OnePlus and Note8. I think 4 GB RAM should be bare minimum for me.
It's a shame that the Pixel 2 duo could be the last Pixels to not be all-glass on rear. I figure Google will go back to glass rears once wireless charging becomes common. No future Pixel will ever be as rugged as the Nexus One seen above. Mine fell on tile twice and ZERO blemishes.
I want Motorola and Huawei to take another crack at it. Not LG, TCL, and Coolpad. LG are using poor displays. Since Google has some HTC engineers, I don't mind HTC again but change up the design. Prefer the name Nexus over Pixel like I prefer to call it iPhone Eks than Ten.
I don't give enough credit to Huawei's one-time at bat with the Nexus. The 6P is prettier than all the Pixels. It's weakness was it was easy to bend and cameras have improved since. Snapdragon 810 also was pretty bad. Still the last pretty Google metal phone and w/ headphone port.
It's Bender with his eyes closed...
6Premium = Nexus GOAT