Since you are inclined toward 135LS, and your id also says so
, go for what your heart says.
P180 has tubeless tyres, better top speed, more weight & more stability but it also makes it maneuver in bazaar areas a little tough. This is my personal experience, after all.
For city & traffic congested areas, 135LS is better choice as well as it gives you more FE(~10kmpl).
If you plan
long tours or more highway rides, I will suggest you 180UG4.
Take test rides with both, ride it for 3-4km and specially in that place where you will ride mostly. This will give you better idea.
If there is a mind-heart conflict, go for what your heart says.
P.S. There is now P220S which you might give a shot too, if it suits your pocket. If you like 180UG4, you will also feel even better with 220S.