When two products are both priced per person
A CRM built to live inside a productivity suite is convenient precisely because your team already works there. The budgeting consequence is that each seller carries two per-person licences: the suite and the CRM. Neither vendor is concealing this, but a comparison that counts only the CRM line understates the cost per seller, sometimes substantially.
Total both lines before you compare anything
Write your headcount, multiply by the suite rate you already pay, multiply by the CRM rate you are being quoted, and add them. That is the number to place next to a standalone CRM that does not assume a particular suite. If you were paying for the suite anyway the incremental cost is smaller, but the comparison still needs to be made explicitly rather than assumed.