Here you go...
1) Interview. Always interview because you might make a perfessional connection that you can leverage later in life.
2) If you get an offer give some thought to how you can best use it to leverage your current position (work from home two days a week? Get more money?). Don't be beligerent about it...don't say "I'll leave if you don't". Just ask for what you want...and then let SILENCE reign (most people talk themselves out of deals).
"I just got an offer from another organization that I was engaged with at the same time I was pursuing this opportunity. I am happy so far working here, but the other opportunity does have so aspects which are appealing...and I am wondering if there is something we can do regarding my current situation here to make it comparable in those aspects. Any chance i could work from home two days a week / get a pay increase"?
If you are asking if you should quit the job you have now for more money....I don't know enough about your industry. Me...yes, I can somewhat assume I could find another job a year from now, so if the compensation differential was really that significant...yes, I'd give it serious thought. On the other hand, benefits can mean alot - especially if you don't have a spouse who gets some (I do).
That is my guidance given the information provided....provide more and I might have a different insight...