I currently have OpenVPN UDP in both gateway, but it seems I won't get it on Mikrotik. One of connection is dynamic, but is registered on no-ip network, and the other is static and has dns on our domain. Now, I don't need any fancy encryption or anything since we use https, but we need reliability and speed above everything. It's best if we can do something like LZO compression we had with OpenVPN as we mostly use text data to transfer between site, e.g email, webapps, etc.
How about speed difference between TCP OpenVPN in Mikrotik and UDP+LZO one?