So far I know:
Trenched Vuma = Active Ethernet. (10 | 20 | 50 | 100 | 200 | 1000/100 Mbps)
Aerial Vuma = GPON (10 | 20 | 50 | 100 | 200 | 1000/100 Mbps)
Any Vuma Reach = GPON (20/10 & 40/10 Mbps)
Vuma Reach split 64 ways over 2.5Gbps down and 1.25Gbps up. So, 64x 40Mbps customers could theoretically contend over the same infrastructure with no hiccups.
Mainly, Vuma Reach is, for lack words, a "charity service" to "lower-income suburbs". Different speed brackets and much reduced price brackets.
Other than that, I suggest you ask
@pinball wizard