First you say Themida is trashtier, then you pick a far inferior packer and state that it is better..? People need to start realizing, that if you have no clue what you're talking about, you should either start your sentence with "I assume" or you shouldn't say anything at all. Silence is bliss.
VMProtect is actually rather bad, as the virtual machine in VMProtect is really easy to crack.
If you have to choose between Themida and VMProtect, you should always pick Themida. Why? Because Themidas virtual machines are much more advanced and much harder to crack than VMProtect. Themida was initially known for their CISC VM which was (at the time) very strong. It has since been defeated (by Deathway) and is now considered weak (since it's actually rather simple once you start to understand it). VMProtect's virtual machine is almost an exact replica of the Themida CISC VM featuring stronger obfuscation, and as such it works in the exact same way, which makes it (almost) equally weak.
Since then, Themida developed the RISC machine (RISC64 and RISC128), which was against defeated by Deathway. They then proceeded to develop the FISH and TIGER machines, which features very new tricks such as complex combined handlers (FISH) doing multiple operations each instead of a handler for each operation like CISC had, and also internal (yet simple) cryptography. The TIGER VM is very similar to the FISH VM (since it is built on the same engine), but doesn't utilize the cryptographic internal registers, etc.
Themida also features hybrid virtual machines, such as SHARK, which is FISH virtualized by TIGER, or PUMA, which is TIGER virtualized by FISH.
The newest machine(s) from Themida is the DOLPHIN machine, which is yet another layer of complexity upon the newer FISH/TIGER engine, while also supplying a hybrid VM called EAGLE, which is FISH virtualized by DOLPHIN (if memory serves right).
If you want to compare the complexity of the newer Themida VMs (e.g. EAGLE) vs. VMProtect's VM, you're probably looking at a complexity scale saying 15:1 or something like that.
TL;DR Don't listen to the guys above, as they are completely clueless on the topic. Pick Themida if you have to choose between the two of them.