Perhaps both aircraft are overkill for your perceived role?
Personally, would opt for As365n1/n2 with corporate fit and floats. Smaller engines than 155 so gives you better range. I did the comparison and found 109/n3 unable to do some of the flights n1 could operating in private/corporate sector. N1 and n2 not option in aoc commercial role due to poor genuine helipad .
Currently fly the 155 and have extensive experience of flying n1 in VIP/corporate role - the interior shot of 155 looks cramped to what is actually available. Much larger cockpit and cabin than 109 range, and reflected in price.