I can’t make a direct comparison, but we had a few Laird LTM-5000s in our facility a while back, and they were very unreliable components to work with on a daily basis. We sent both units back more than once and were never fully satisfied. There were frequent dropped frames during playback and I vaguely remember a workaround where turning External Video off and on would straighten them out for a while…
We also have a number of AJA Io boxes in use now and, as people are likely to say, they “just work.” Very tight integration with FCP (Apple develops the drivers for it).
Bill