Need some head, help

Ok, so 7 years ago when I was much, much less experienced I built my 360 and I used 3769973 heads which are 318 heads with 1.78 intake and 1.50 exhaust. Anyways I had the heads decked, 3 angle valve job, better springs we did a lot to the heads. All of that brings me to this, I have the chance to buy a set of J heads casting number 3418915-H with intake of 1.88 and exhaust of 1.60. I am pretty sure I can grab them for like 200.00$ would I actually notice a difference and or is there a real reason I should switch over?