No direct experience with either school, and I especially can’t speak to the quality of the programs you are interested in, but in terms of general perception, these two schools are on very different trajectories, imo. Richmond has an massive endowment and is aggressively looking to grow and improve in every way it can; Trinity is much more in survival mode. The same is very much true for the regions in which they are located. Let’s just say I strongly disagree with the poster who said that Hartford has a vibrant downtown :-).
Neither school is particularly diverse and both have an over-representation of wealthy families (the latter will be true at any selective US college). Richmond’s campus is completely self-contained and a pretty decent distance from downtown or other amenities; Trinity is closer to whatever there is to do in Hartford. Richmond has much more temperate and pleasant weather during the winter months.
Trinity is an excellent school, don’t get me wrong, but if it were me or my kid, Richmond would be the easy choice (assuming finances/ease of travel/etc were all equal). Good luck with your decision and congratulations on having two enviable options.
Edited to add: this article may give you some context about the financial situation at Trinity and its dependence on full-pay students, although I think things have stabilized: What College Admissions Offices Really Want - The New York Times