Sprint's coverage and network is a mess, that is true, but the performance of the iPhone is also poor.
https://www.reddit.com/r/Sprint/comments/9fborl/iphone_xs_and_xs_max_both_support_band_41_hpue/
If you actually read my post you would see that I said that *I* got an SE as a toy phone, not that it's a toy phone in general. However, it's usefulness on AT&T and T-Mobile has pretty much run it's course, given how many LTE bands it lacks.
I got two from the AT&T Prepaid sale, they were about $90 each after the Prepaid SIMs I had to buy with a month of service- not a bad deal at all.
Qualcomm modems have been outperforming Intel modems for at least 7 years, so this isn't anything new. Further, Intel iPhones can't even perform as well as several generations old Qualcomm iPhones or Android phones, so clearly they have a ways to go performance wise.
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I'm not debating that iOS is better with RAM management, but at some point, you will overcome the differences if you throw enough RAM at the problem. It does depend somewhat on the flavor of Android too, and how it's optimized. Near-stock Android works great on 3GB of RAM on my Moto G, while my S7 with 4GB is a laggy mess due to BloatWiz, although it's gotten much better with new BloatWiz a.k.a. Samsung Experience on the S8 and newer.
I'm not that concerned, as the Android phones have gotten much better, but I do like to keep a toe in the water on each side... for the foreseeable future, that will have to remain the iPhone SE on the iOS side, as there's nothing out there that's adequate to be my daily driver.