I also have both. A sharp blade is the key. My cousin & I split an order of 100 45MM blades on ebay for less than a dollar a blade. I found now I'm more apt to change them when needed rather than applying more and more pressure. I spend lots of $$ for fabric for a quilt, so why not also use a new blade for less than a dollar every couple projects. I use the 45 almost all the time, but the 60 does come in handy when cutting many layers or squaring up a quilt after quilting to cut thru the whole sandwich.