I like the first in each pair.
These are JPEGs, so only 8 bits per channel, and probably lossy compressed. Can the lab supply images that have not been through JPEG compression? If they can, you can do more with the results.
You can certainly give the images more “punch”, using any editing tools. If you don’t take it too far, I expect you can come up with a formula that can be used for other scans. For example: an S-curve to increase contrast and saturation in mid-tones, and an unsharp mask to increase local contrast and saturation.
magick 486327f85834f8389a80d5fbd95f324477f1a276.jpeg -sigmoidal-contrast 5,50% -unsharp 0x10+0.5+0 x.jpg
I have taken this too far for my taste, but it shows what we easily can do with very primitive processing.
