There are dozens if not hundreds of grape varieties, in various colors, both hybrid and open pollinated. Most are indeterminates, some are probably dwarfs or determinate varieties. Many of the tomatoes with that shape and size were named before the term "grape" was coined (IIRC, in the early 90's).

And there must be at least a couple hundred different Roma-types -- again all colors, both indeterminate and determinate, both commercial varieties and those grown mostly by home gardeners, etc. Some have "Roma" as part of the name, but most don't.

Most varieties did not come from a simple cross of two known varieties. In many cases, one parent is unknown. In other cases, a seed got in the wrong packet, or a packet was mislabelled, resulting in the same tomato ending up with two (or more?) names. And most varieties were refined over several years (at least), and were not the same as the original hybrid.

To know for certain what you have, we'd need to know the name of your two (possible) parent varieties, and whether they were hybrids or open pollinated. But knowing that information almost certainly wouldn't tell us if your new hybrid is identical to any of the 15,000+ varieties currently listed in the large databases.

So grow yours out for several years to make sure it's stable. Give it a name (is there one named Sweet Meat?), maybe name it after yourself!

Here's a link to Tatania's database of about 3,000 open-pollinated tomatoes; this is the link to the page that lists tomatoes by category (there is also a list that's alphabetical by name). You want the section "Tomatoes by Fruit Type." She lists only 9 grapes, but I'm sure many of the cherries could be categorized as grapes, and of course there are many commercial varieties, mostly hybrids. Romas can be found in the Paste category.
http://tatianastomatobase.com/wiki/Category:Tomatoes

I can give you links to other databases (many including hybrids; some including commercial varieties), if you'd like.

Thanks for the informative reply. The grape is jelly bean but I can't find the roma packet now. I'm sure it's here somewhere. I'll find it and go through the DB. Thanks again.

John