No, they're pretty darn similar in appearance to the untrained eye. Pattern doesn't really mean squat because both species can have fairly variable patterns, and the intensity of their patterns can vary based on water clarity, substrate, and other factors. There are some nuances in their morphology that can be used to differentiate between the two species, but said nuances are pretty tough to spot without working with multiple specimens of both species for an extended period of time. Solomon (E_americanus) and Richard (Pejelajarto) can elaborate more on the ID part much better than I can, though, since they have the most experience with spotted gars (and gars in general) out of any of us.
A large number of all Florida gars in the trade are farmed in various locations around the world, so if they're from a farm then they are almost certainly Florida gars because there are no farms for true spotted gars that I know of. If they were collected in the wild, then there is still a great chance of them being Florida gars because Florida gars are commonly collected for the fish trade while spotted gars are not (mostly due to their population status throughout a decent chunk of their range).
With that being said, the fact that these gars were collected from the wild in Texas means that they are almost certainly true spotted gars because said spotted gars naturally occur there while Florida gars do not. There are other species of gars that occur in Texas, but these gars definitely seem to be spotted gars rather than any of the other species, so congrats on being one of the few people on MFK to own true spotted gars!
