The 'VU9P has ~2.5M logic elements and 6840 DSP units.
The M2S090 has ~90K logic elements and 84 math blocks.
It's nowhere near the same class of device.
The AWS FPGA offering only makes sense if you absolutely need a massive FPGA connected to massive amounts of RAM, and don't want to spend the bucks to own it yourself.
This is about half as powerful but comes preassembled and ready to go. Also "only" $500