Hmmm... this is difficult. While albums certainly get much attention through teasers, press releases, trailers, etc, I don't think the individual songs get more attention. I think it's more on the contrary.
There are very little track-by-track reviews from people for albums. Much kudo's for the few who actually do this, but it's VERY time consuming. That way, individual album tracks don't get much reviews. This is especially true if the albums are very big (30-50 tracks), that scares a lot of people from doing a whole album review. Also, all the attention and promotion of the album is being divided by 50 tracks. Add to that the fact that the tracks that are most listened to are the tracks by teh "famous" people and you really have little attention for unknown remixers that have a track on a large album.
Solo OC Remixes on the other hand, lack the trailer and the press releases, but have their OWN spotlight, get their OWN reviews and have their OWN release own the YouTube channel, getting many views/attention and even more reviews thourhg the YouTube comments.
To conclude: I think solo OC Remixes get more attention that tracks on albums