Much of a muchness
Definition 1 of 1
Pro Tip 1/3Usage Frequency
The phrase isn't used commonly but is recognized by most native speakers. 
When the two scarves were similar, my grandmother said it was much of a muchness which to choose.
Pro Tip 2/3Conversational Tone
Use this phrase in casual conversation; it may sound odd in formal contexts. 
Deciding where to eat? Both places are much of a muchness, really.
Pro Tip 3/3Indecisiveness
Ideal to express that a choice is hard because options are so alike. 
These two colleges are much of a muchness to me. I can't decide!