^Nm see now that you were asking in regards to legit products such as both from MA and I think the science points towards somatozine having good enhancers to the MK but overall may not be needed depending on your diet etc, and that what's best is gonna come down to that. If you got everything else in place and it's cheaper than go with the liquid but unless trying to save money no point in not having all your bases covered I'd just get the pill
If they are both from Mike Arnold it doesn't really make much difference as both should be gtg. The benefit of liquid is you can start very low and gradually build up the dose. That's good if you are extra sensitive to a particular side effect. For most people who are fine with MK-677 it won't really matter and I generally prefer caps (no bad taste). Now his cap product contains other ingredients which could benefit you but you can't go wrong either way. I see 1 cap is also 12.5mg so a nice starting dose for most people.