Odd effects of coffee creamer. Thoughts?

So I notice my sugar spikes crazy high with my coffee in the morning despite using Splenda and sugar free coffee mate vanilla. 2 carbs total and I typically take 1 unit per 20 carbs. Sometimes I need 2 units just for my coffee.

The other day I saw funfetti flavored creamer and I love funfetti so much. I bought it despite it being not sugar free. It only has 5 carbs per serving vs the sugar free 2. So I have my coffee and I wait until I see the upward curve so I can take my shot (I always wait to dose, some days I am very sensitive to insulin). Well the spike never came, just a little bumb. I've since tried other fun flavored cream and it was the same. I tried to go back to the sugar free once and the spikes came back. I'm super stoked to have options on creamer again. It used to suck, looking for usually the only 1 or 2 sugar free options while looking at all the fun flavors.

Any thoughts on why the sugar free stuff spikes me and the regular stuff just brings me up a tad?