Yes, it does seem a small page count for a pocket book - unless, they've forgot to adjust the details from the big corebook on the catlogue entree. On the other hand, it could be a page-by-page reprint, but with a smaller typeset.
We do know that the pocket book will be 'complete' however, and Mongoose did make errata adjustments to the pdf release (apparently), so it should be OK in that regard.