You're friend has given you some rubbish advise I am afraid - the SSD one will be around 10-20 times faster. I would strongly advise you to take it back and exchange it. It is THAT much better.
Over time your non-SSD drive will become "fragmented", this means it will get slower and slower, in a few years it will be so slow you will assume you need a new computer. You can keep the same speed from day 1 with an SSD.
Macs also work out cheaper overall, I have a 2008 MacBook Pro that is as quick as the day I got it and never had a problem, runs on the latest software too. My workhorse Mac Pro machine at work that gets 40-60 use a week is 9 years old, and again, as good as the day I bought it.
Both have been upgraded to SSDs, by the way, which made them 10-20 times faster.