It really depends on what your intentions and expectations are for your purchase. There really is no perfect scope that will do everything well, so it's good to set out some priorities to help figure out the best compromise. Many of us end up with more than one scope
A 100mm apo and a 6SE will give you a different observing experience. The apo will probably have the upper hand when it comes to contrast and sharpness off-axis, but the 6" SCT will have around 2x the light grasp of the apo so will show you more of the faint stuff. The apo will be able to show a much wider field of view than the little SCT.
You'd be able to get away with some planetary photography on the SE mount, but for the faint fuzzies an SCT isn't necessarily the best choice unless you're keen to invest in hyperstar. Either way deep sky photography is not an inexpensive pursuit!
Your location also raises another interesting weather-related point...dew. A refractor might be a better choice in that respect, but no scope stays dew free if the humidity is sufficiently high. I've found the 6SE to be pretty resilient, bigger SCTs not so much
