I bought these two lipbalms on my last visit to westfield shopping centre and superdrug was having a 3 for 2 offer on all skincare.
Simple: SPF 15, it doesnt say how much of the product you get..
Softlips: SPF 20, 2g
You can see from the picture that the Softlips tube is thinner and longer and this can be seen as an advantage, however the Simple lipbalm was more easier to apply onto my lips, as the Softlips lipbalm, because of how slim it is I had to apply it twice as much compared to the Simple lipbalm.
^ Because of that reason I like the Simple one more, but i wouldn't totally out the Softlips lipbalm because of that one reason.