2GB more VRAM, re-BAR, hardware support for newest CODECs, tensor cores for future AI stuff like XeSS, RT capabilities and I'm sure there are a few more reasons. Sure, the RT-power wont' be great, but it is at least there to try out just for kicks and I'm sure that if RT becomes standard even at the low-end, more casual games will bother implementing it. I'm sure many game developers wish all hardware would support RT as a baseline so they could develop along a single pipeline.
As long as driver support gets up to par, the A380 should become a far more future-proof option.
Also, $70 above a $130 A380 is $200, which is more than the RX6500 typically goes for and is faster than the GTX1650 as long as you make sure not to bust through the 4GB buffer. At that point, may as well throw yet another $70 (35%) on top and get an RX6600 which is roughly twice as fast as the RX6500.