why not get the regular a2? xiaomi makes good hardware, but miui is just nasty. Thankfully there's android one editions. Even the lite is good, but the 625 is really showing it's age now.
Xiaomi phones are usually good quality for the price, yet their Android One history (just the Mi A1 so far) is far from stellar regarding bugs and timings, but it could be blamed on the fact that it was released with 7.1 and no Treble support which might have stunted it a bit or made things difficult in order to update monthly. Otherwise the Mi A2 Lite could be a good option, I've been playing with one at a store today and it looked good, and a SD625 + 4k battery means killer battery life but take into account it would be a sidegrade over your Z Play: IIRC both have exactly the same chipset.
If your only option is the G6, I'd go for Xiaomi. The Motorola brand is as Chinese now as Xiaomi under Lenovo after all but be careful with the LTE support since those phones are designed for the EMEA/APAC markets first and almost always are missing some crucial band required by USA carriers. Also, if you don't mind a slightly smaller screen and 16:9 ratio, you can also get a Nokia 6.1 for a little bit more. The additional money will buy you a slightly better chipset, 5GHz wifi support, NFC and a USB-C port (though you'd be back to a 3k battery)
Edit: if you've got the money (and you're in a market where it's available), the Nokia 7+ literally has it all regarding mid-range specs, and it's probably the best phone available right now just before stepping up to the SD8xx series.
This right here. If you're in the market for a Xiaomi A2, just save up a bit more and buy a Nokia 7 Plus. Better build quality, Micro SD slot, Headphone Jack and a lot more features.
Otherwise, if you are aiming lower on the price braket, the A2 Lite is a bogus phone. Yes its stock Android, but if you're gonna buy a cheap Xiaomi, juat go for the Redmi Note 5. Yes its MIUI, but for lower than ~200$/£/€ you're getting a solid SD636 powered device. The A2 Lite is ridiculous, a notch phone power3d by the SD625.
Thanks for the replys
I live in Brazil, so Nokias are not an option right now (c'mon HMD why you don't want my money?). I'm considering the A2 Lite vs A2 because of the battery, expandable storage and headphone jack, but I'm getting the Android One version either way. They support 2 out of the 3 LTE bands here, the one that is not supported was turned on just last month. I'm aware that it uses the same chipset as my Z Play, I'm not a heavy user and am fine with the current performance, so it would be ok for me.
If the G6 Plus had a better battery it would be easier to choose lol, I don't a one year old phone that need to be plugged twice a day