About to buy my first ever arranger keyboard

Planning to do some duo work with vocalist and/or trio work with vocalist and bassist

Shortlist of these two keyboards based on reading online and watching YouTube demos.
Got to try them out a couple of days ago

Both only single microphone input, and no separate vocal output

PSR in-built speakers sounded far better than the Korg, but not much difference through headphones.

Based on a quick play I got more out of the Yamaha, but I was wondering if after taking time to get to know the Korg and how to tweak it I could get more out of it in the long run.

Can anyone with more experience than me advise on the differences? the pros and cons of both?