and its also smaller than a regular X60 I believe
The tablet is larger and heavier than the regular X60 and the X60s.
The use of the words "large" and "heavy" add to much significance to the weight difference. We are not even talking about a full pound.
The X60 tablet is a convertible and serves just fine as a regular laptop. It's only when you swivel the scren that you notice the difference.
Depending on your configuration, the price penalty can be slight or severe. In either case though, it is worth it.