First, you are equating "good" with "perceived speed." Latency and jitter, in general, have little to do with bandwidth.
Latency is a measure of the rather fixed limits of physics. Distance, routing and switching delays all contribute to the latency between any two nodes. Higher or lower latency doesn't make a link good or bad. Lower latency is better, but there's usually very little that can be done about it. (speed of light being what it is and all.)
Jitter is the variability in latency. Jitter is "bad". It's a function of queuing, buffers, processing loads, and generally the fact that there's other traffic competing for the link. Lower speed links will tend to have higher jitter due to the delay one packet will cause for any other.
Protocols can easily deal with latency -- i.e. by transmitting more data without any acknowledgement. But jitter is problematic because of it's randomness and very nature -- sending more traffic could overflow a buffer.
So... why is net-1 "worse"? It's a longer link, passing through more hops, and thus meeting with more congestion? (you've given nothing on which to base an actual factual answer)