I was having an issue where optmilp ran for over 24 hours and had not finished solving and optlp would complete in a few minutes. Due to the Big-M and integer drift problem optlp does not really honor one of the constraints (so this may not really be an apples to apples comparison).
This is the scaled up version of the sample I posted in thread:
Logistics Optimization Problem (constraining ARCS flowing to NODE)
Attached are the logs and code with one running optlp and the other optmilp. If anyone has any suggestions on improving solve time that would be greatly appreciated.
Thanks!