I upgraded to a 14" MBP M4 Pro from a 13" M2 Air. Not because I needed to do so, but because I wanted to do so. The things I noticed.
1. The speakers are better.
2. The machine is faster.
3. The extra 1" was a little better.
4. The screen was slightly better.
5. The machine is heavier.
6. I needed to buy a new carry case.
7. The SDXC slot is a major convenience for my photography.
8. The MBP cost a lot more.
9. The MBP is bulkier.
10. The machine does not throttle with Lightroom.
11. The right side USB-C is nice, but not a game changer.
None of these are significant by themselves. Add them up and the MBP is a better machine. However, if I had to chose today, I would go with the 13" M4 Air, 32 Gig, 1 TB. I travel with the machine and the Air would make a great travel machine and serve my needs. Not as fast at the MBP, but fast enough for my workload.
I think both of your choices are excellent and it comes down to funding. The less expensive Air leaves some room for accessories. The first of which I would get with the savings is an external SSD and enclosure.
To each their own. My needs/desires certainly do not reflect what others want/need. Pick one, don't look back.