Neither one of those modules is a suitable replacement for aggregator in core (both do feeds-as-nodes and feed-items-as-nodes ... which is great / necessary for some use cases, but bad for others).
Not entirely true - the Feed Parser module does have an "items as aggregator.module" module, but it has fallen into disrepair. I plan to fix that up for my own needs.
Side note: core needs love. It needs your love, and everyone's love. Views in core, more of CCK in core, improved / re-factored / API-ized aggregator -- etc. etc. etc. Oh yes, it also needs testing love, issue queue review love, documentation love. Where's the love?
Is this intended at me? I can scratch only my own itches nowadays.
+1. And lo, the discussion from many years continues.
Unfortunately, yes. Can you sum up why it's never settled? -- Morbus Iff ( dare you overpower my stench of eeeevil? ) Technical: http://www.oreillynet.com/pub/au/779 Culture: http://www.disobey.com/ and http://www.gamegrene.com/ aim: akaMorbus / skype: morbusiff / icq: 2927491 / jabber.org: morbus