With your Aries friend you have those lovely sun/mercury, mercury trine moon and sun/venus contacts. However, you have mars/uranus and mars opposing Uranus, both volatile, as well as Chiron con your ascendent/moon. To top it all off, Saturn on your descendent. Saturn is his descendent ruler, so this could be a binding tie, but it doesn't link with your asc/desc except for the opposition to moon, which can by trying. This can be a very heavy relationship to deal with.
Your Leo friend on the other hand has Jupiter/venus conjunct and Jupiter square Venus, these are the rulers of your two descendents, so this links you two together. Your Venus on his descendent is another link, and makes life together so much easier. Moon/mars opposing pluto can be dominating, but in this case it could be more of a generational contact both plutos are conjunct. You haven't included the aspect tables but it looks like your first house moon and mars are not integrated in the charts, is this so? All in all, life may be easier with this man.