Straight razors can provide the best possible shave, with the least possible irritation once mastered. You can get a DE to shave as close, but due to the fixed angle of the DE, you can’t alter the angle. Altering angles on the fly (scoop like motion) and throughout a stroke is needed for more sensitive areas on your face. Straight razors also provide far more feedback, so you can “feel” when you need to change angles and pressure. The way you’ve asked the original question - leads me to believe you’re always going to have that nagging doubt, until you try it .
That said - I’m not a big fan of shavettes though, and would probably pass on that - it’s all the drawbacks of a straight razor, with only one benefit - the ability to change angles on the fly. The benefits of a traditional straight razor, is much higher quality steel, a more consistent edge (DE’s you’re generally not stropping, so the blade performance changes every time it’s used until it’s discarded), lots of feedback, evenly distributed heft to allow the blade to more naturally glide through the hair as it experiences resistance, a more forgiving edge, that allows you to cut closer - and apply pressure with minimal irritation, a more rigid edge, etc. With a straight - you really learn how to tune the blade to your desired application and liking, and you “learn” that particular razor/blade - and have a consistent experience every shave. If I ever feel a slight degradation in edge sharpness - I strop it 6-10 times on a pasted strop and I’m back to the same consistent edge. With a DE blade - you start with a blade that wants to take your face off along with your hair, and you throw it out before it pulls and skips, so you have a continual up/down cycle in sharpness, which is far less forgiving if your technique is off. On the flip side - there’s a learning curve with a straight, but once you get past it, it’s about as consistent and reliable as a hammer.
That said - I’m not a big fan of shavettes though, and would probably pass on that - it’s all the drawbacks of a straight razor, with only one benefit - the ability to change angles on the fly. The benefits of a traditional straight razor, is much higher quality steel, a more consistent edge (DE’s you’re generally not stropping, so the blade performance changes every time it’s used until it’s discarded), lots of feedback, evenly distributed heft to allow the blade to more naturally glide through the hair as it experiences resistance, a more forgiving edge, that allows you to cut closer - and apply pressure with minimal irritation, a more rigid edge, etc. With a straight - you really learn how to tune the blade to your desired application and liking, and you “learn” that particular razor/blade - and have a consistent experience every shave. If I ever feel a slight degradation in edge sharpness - I strop it 6-10 times on a pasted strop and I’m back to the same consistent edge. With a DE blade - you start with a blade that wants to take your face off along with your hair, and you throw it out before it pulls and skips, so you have a continual up/down cycle in sharpness, which is far less forgiving if your technique is off. On the flip side - there’s a learning curve with a straight, but once you get past it, it’s about as consistent and reliable as a hammer.