RE: 40 LA to a 46 FX... Difference?
Ditto to the last 2 posters. You will enjoy the extra ponies. Nothin beats cubic inches (exept cubic dollars). You will appreciate the extra pull when you need to get out of trouble. Enjoy your thoughtful gift.
Mark Shuman
PS: don't forget that the FX will use slightly more fuel so flight times may be slightly shorter. And be sure to break it in.