Does anyone use the XL version? I was thinking of buying one but it seems like ut only works for non xl version.
From what I understand, the 3a and 3a XL install the same way. The difference between the phones is the screen resolution. The port was developed on a 3a, therefore the UI is larger on the XL because of the scaling. This can apparently be changed with UT Tweak. Also the larger battery capacity is nice.
I don't have any first hand experience on the 3a XL.
There might be minor hardware differences, too. At least on Pixel and Pixel 2 the XL variant has a different build tree with some incompatible differences.