As multiple people have said, StB has a lot more BS cards that make you want to throw a brick at the character shooting the danmaku. Meanwhile, DS has hard cards, but not nearly as BS as they look. For example, 7-5 of DS looks like a near impossible card, but in reality, it's all about taking the pictures right when Shou comes at you and getting your tengu behind outta there while the lasers are gone. Meanwhile, with something like, oh say, 7-2 of StB, the only pictures you can take through the first 20 seconds or so are safety shots, and mind you, you may just need them with how the bullets position themselves, and even then, it screws you upside the head if you don't circle perfectly.
And with the topic of stage 6 of DS, Yuugi's cards are probably more timing-based than Suika's. You have to take the pictures at a precise time in each of them, albeit the first. You have to shoot the bullets out at a specific time to make it as easy and doable as possible, especially in GIANT CURVING LASER and ONI ROAR cases.