The N8 markings certainly seem the same as the ones I got in the UK,only the UK ones are hexagonal in shape.I once got arrow generic made ones off a site year's ago now so that may explain the arrow sign?.
On the S/L ones they are only 0.2mg if my memory serves me right and I know they were small with no markings,but it's been a fair while since I've ordered now.I would say you'd be good to go with them though as SLs meds are All WAYS of good quality....
Bliss......