Maybe they're not supposed to be equivalent.
Yes, Romulan Marks are harder to accumulate by several orders of magnitude, but maybe that's by design.
Not saying that I agree with that design, just playing devil's advocate.
Some companies keep the players interested by having so much content you couldn't go through it all as fast as it's released, Cryptic achieves the same with timers.
Got your 60 Romulan Marks? You can't get them anymore today! Enjoy the daily wait! Have fun accumulating 500 for a project!
Oh, and forget about alts!
Running ESTFs on alts is possible, but trekking all the way to Tau Dewa, doing the daily and trekking back to ESD on several chars takes entirely too long.
Azure Nebula and the Vault Ensnared give way too little to be justifiable.