[tor-relays] Which is the most useful: relay or bridge

[Thoughts]

Currently running both a guard relay and a bridge, one each on two 
different systems, but both behind the same firewall and static IP.

Curious if this is a good idea, or if one or the other is of much 
greater value.

Seeing about 2200 inbound, 2800 outbound connections on my relay per 
nyx, with an observed speed of 5 MB/s (only a few days into the guard 
ramp-up phase)

Seeing about 20 connected clients on the bridge, which is advertising 
2.2 MiB/s per the metrics page.  R/W rates around around 150k per that 
same page, about 1/4th of the average on the guard relay.

Thoughts?