Yep!
If my SP2 had 8 Gigs of Ram, I wouldn't have my SP4 now.
That article on battery size says the Surface Pro 4 battery is smaller than the SP3 battery It doesn't say the M3 SP4 has a smaller battery than the I5-I7 SP4. Am I missing something?
I'm pretty sure the SP4 battery is the same size as the SP3 battery... but I don't remember where I read that.
I'd argue logic. Since the M3 uses a lot less power, the battery life is almost identical to the i5/i7 versions. Therefore, where is the power saving feature? You can get to two arguments:
1) the m3 isn't as power efficient or
2) the battery size is smaller, coupled with a more efficient processor and no fan, they were able to save some cash on the saved battery and fan and keep the same battery life.
1) Well, the m3 is certainly more power efficient, as it certainly uses less power than either the i5 or i7. Where are the power savings in this case? I guess your power bill, as small of a difference as it may be. Problem is, with the smaller battery, you will see no real world benefits of lesser power consumption because at best, the m3 model is designed to have comparable battery life to it's bigger processor brothers, not exceed them, as it well should have.
2) And therein lies the rub. They put less battery in the m3 unit to save money, therefore increasing profits. It was a smart business move, tons of people are still buying the m3 model even though it has only comparable battery life to its bigger brothers.
But I'd like to present a 3rd scenario here.
3) With Connected Standby disabled, I was able to underclock my CPU (current max is 50%). So I'm now using way less power, yet I still have the full sized battery that came with my i5 model. Using only 50% may seem kind of absurd, but I've still got processing power to spare for 90% of the time I'm using my SP4. I've been running about 2 hours and I've only used 20% of my battery.
I propose that scenario 3 is the best of both worlds, and would suggest that the i5 model really is the better option for the same price as the m3, unless you are considerably sensitive to the weight of your device.