When someone sez a fish is different simply because it is a different colour that should raise a red flag. Anyway one of the best sites for info on various catfishes include pleco is planetcatfish.com:
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www.planetcatfish.com
and
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Probably the major difference is that L128 come from a warmer region; is more delicate; has less of a requirement for strong current (not sure this is strictly true); and is a bit larger but otherwise they are closely related in that they come from the same family.
Truth be told broadly speaking many pleco are similar. There are those that eat more veggie than meat; and those that eat more meat than veggie; those that like or require strong current and those that are more content without such; those that are much more territorial and those that are more passive and of course those that are more likely to play during the day and those that are strictly nocturnal. I suppose there are other differences and frequently planetcatfish will include info about one species that is relevant to another but neglect to include those additional details.
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One should not under-estimate the aggression level of a territorial pleco (btw males are far more aggressive than males in most cases.
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As to your question; as long as the water is clean, warm, decent current and well laid out with appropriate boundaries 2 should be fine in a 60g.