By the nature of your question, it assumes that you cannot zero out the differences using whatever saddle rail or headset spacers are available to make the fitting specs of both bikes the same.

Depending on how finely tuned your current fit & position is, 13mm more drop can make for a meaningful change. Transfer a 10mm spacer from below the stem to above the stem of your current bike and try it out. If you’re already riding with the stem slammed then you probably know what you’re doing and can figure out your new balance point with a few minor adjustments.