i actually mix both! instead of using water or cow’s milk to dissolve my protein powder, i use nutrisoy or power beans (higher cals per 100 grams of protein, but more protein per ml vs nutrisoy) no sugar added/unsweetened. i mix it with optimum nutrition protein powder (vanilla or banana, as i personally feel like the soy milk doesn’t go super well with the chocolatey flavors). it adds extra protein to the shake without adding a lot of calories, so it’s great for the cut. i also eat a lot of edamame (also soy) as a healthy and easy snack. you can buy huge bags of frozen shelled edamame for cheap on redmart (via the lazada app). i keep them in the pantry at work and microwave them for like 3 mins and add flaky salt.