As synapsin said, it doesn't have to be either or, and they both have different uses. Of course, not everyone will like every adaptogen, or want to spend money on them, but I don't really consider them all that similar just because they're adaptogens really. I really like cordyceps militaris for endurance, but I also really like ashwagandha for stress/anxiety reduction (although it also can have endurance/performance/body composition benefits). Bacopa is another adaptogen I like, but I wouldn't really compare it to cordyceps at all, haha. Tongkat ali can also be considered an adaptogen (I like it for increasing libido), but it's also different than cordyceps and bacopa. Adaptogens are a pretty broad/diverse classification, and there are a lot of potential uses from different adaptogens. I tend to keep some KSM-66 caps on hand for regular use, and don't take any extra ashwagandha when I'm taking AlphaMax XT, which contains ashwagandha and tongkat ali, and I also get cordyceps militaris from Xtend Perform and the bulk powder (2g from each). Of course, you don't need to take a dozen different adaptogens at a time, but I find that some of them stack quite well together.