While don't have any info or even anectada about the other, JIRA is even more bloated on the server side - we had JIRA hosted on premises and it was used mainly for tasks and tickets in a team of 5 people. This "metric" (team size) limits the amount of tasks/tickets that would be processed. Anyway, the JIRA itself needed 2 cores and 8 GB of ram just for that. This is really even beyond absurd.