Hi, nice boat! I just got a 1984 Macgregor 25, for a song from a backyard in NH. Mine is a nice boat, a time capsul that had two owners before me, the first sailed inland in fresh water, the second left the boat in that back yard, since 2000 or so, more than 16 years in one place.
I think that I would prefer a Venture however, on the basis that the keel is heavier / displacement ratio is higher, I've read that the construction of the boat is also a bit heavier and that there is no liner so that there is direct access to the hull of a Venture, but not in the Macgregors. I'm not sure about anything except that the keel must be the 800 lbs (Venture) versus the 650 lbs (Macgregor). I can see that you venture windows have an aluminum frame, which make the attachment mechanical not adhesive and it would be more expensive and repairable than adhesive. I can see that your Venture galley is formed into a nice location and that it includes a stove. I like that much better than the Macgregor 25 galley solution (just a box with a very small molded sink).
For folks like me who want a little more off-shore range and a little more self-righting / range of stability and a little more structural strength, I think that the Venture 25s are a little bit better than the Macgregor 25s...