The Yeti is easily good enough to do the job and will outperform the dynamics especially at high frequencies... the built-in ADC pretty good as well. I suggest you check you're getting the most out of the Yeti by checking your gain settings to ensure you've got a healthy input level and the signal is not clipping. Also check the recording parameters - bit depth (ideally 24) and sample rate (at least 44.1kHz).
By the way, the Yeti has three capsules so is in effect three microphones... these get mixed together to produce the different frequency response patterns. If you don't have a whole lot of experience then a single stereo mic like the Yeti will help you avoid the hassle of trying to phase match a spaced pair of mics (look up xy configuration if you're going to use two mics).
By the way, the Yeti has three capsules so is in effect three microphones... these get mixed together to produce the different frequency response patterns. If you don't have a whole lot of experience then a single stereo mic like the Yeti will help you avoid the hassle of trying to phase match a spaced pair of mics (look up xy configuration if you're going to use two mics).