I would go with the Maverick. I own, several Hatfields (as lending guns for clay shooting) and I would have to say that they are kind of spotty, quality wise.
I also own several maverick 88's and they have all been very reliable guns thus far.
If you are worried about prices, and you're willing to put in the work, I would recommend looking at a hatfield 20 gauge. The 12 gauge is quite a bear to shoot after awhile, but I've found my 20 gauges will be used for longer without any issue at all.
Things I would recommend looking for when buying a hatfield:
Barrel/Rib Fit and quality (yes I have found many hatfield with misaligned ribs, and one that had metal imperfections in the Barrel steel)
Barrel Release Fit: When pulling back on the trigger guard to open the barrel, check to make sure it is not overly difficult to operate
Barrel to Frame fit: When the gun is open, fold to make sure the barrel is not binding on the frame anywhere, it shouldn't be tough to open or close
Wood quality: I have seen several hatfields with cracked stocks, be sure to carefully check over the entire stock for major imperfections
Things you probably won't see:
My most used hatfield has a misaligned Forearm retaining nut, so reassembly can be a bear at times.
You may not be able to test trigger pull in store, but if it is too heavy, there are tutorials online to lighten the pull weight a little
The Finish is not good at all, and with you're first cleaning, wiping the exterior of the gun will wipe a lot of excess finish off, I promise it's not grease, I'm still wiping finish off my gun whenever I use a little bit of oil.
That's pretty much it for my Hatfield buyer's guide. As I said, I have had a few for lender/beater guns. A good Hatfield seems to shoot alright, but there's a lot to have to look for when buying, especially since these are NIB and not used.
If you were looking for a workhorse that will be a great gun overall, I would recommend the Maverick. Overall the quality is much better, and It won't let you down. Since the maverick you're looking at is used, I would check it thoroughly to ensure the gun isn't suffering from any concealed issues, such as barrel pitting or something similar.
Hope that helps
~Leo