I’ve compared both formats while looking for something that would be practical for my morning routine, and I personally find liquid extracts more convenient. There’s no need to measure out a powder or deal with clumps, and you can simply add the recommended amount to water, tea, or another drink. I found a selection of liquid mushroom extracts at Amanita Universe
https://amanita-universe.us/ and liked the variety of options available. Their lion’s mane liquid extract was one of the products that caught my attention. Of course, the concentration and extraction method can vary between products, so I’d recommend checking the label and serving information rather than assuming that one format is automatically more potent. For anyone with a busy schedule, though, a liquid extract can be a very convenient way to keep a supplement routine simple and consistent.