So as promised, I tried this test. The results were..interesting....
Edgerouter lite directly connected to Edgerouterlite (keep in mind this is megaBYTES per second not megabits) were:
- OpenVPN tunnel: 1.04 MB/s (a hair faster than internet speeds)
- IPSEC tunnel: 8.5 MB/s (significantly faster).
I think this lines up with everyone's input: OpenVPN is limited due to it being software-based. IPSEC looks to be limited by factors of the public internet.
-Bob