RE: Combi Perfect Match Convenience 6620 v. Combi Savvy DX
I have not owned either of this stroller, but I did look at the Convenience 6600 series very closely. They are bigger strollers than the Savvy DX in both the seat size and folded size. I don't remember the difference anymore between the 6610, 6620, 6630, but canopy size and wheel size are one of the differences. The basket is much bigger and stronger on the Convenience line. To investigate further, you could look in the Baby Bargains message boards, stroller folder, and do a search of Combi convenience. Some poster - a father, as I recall - posted a very good summary of the differences between the different Combis back in 2002, when I was shopping for them.
The Convenience strollers often are a little stiff folding and unfolding, as I recall. They made a cracking sound when new, but I think that might loosen up over time. Also, the baby store where I looked in person, insisted that the wheels had to be lined up and locked before closing the stroller, or the wheels would ultimately break. I sincerely doubt that most parents bother to do that, but the stroller did seem to close better with wheels locked.
Not much help, I'm afraid, but I hope it adds some info. from the actual owerns and users of this stroller.
Edited to say: I just did a search and didn't find the review I was looking for, but here are three others that may be helpful.
Regarding different models of Combi Convenience
http://www.windsorpeak.com/dc/dcboar...ng_type=search
Regarding Convenience vs. Savvy
http://www.windsorpeak.com/dc/dcboar...ng_type=search
and
http://www.windsorpeak.com/dc/dcboar...ng_type=search
Advice and commentary on living overseas
DD1 15, DD2 12, and DS 9