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Please can someone tell me what the difference is? - bushnell pinseeker 1500 laser rangefinder 205103 golf w/ slope w/

Hello, I'm buying a laser rangefinder Bushnell this week, and I am the healing Bushnell Pinseeker 1500 Bushnell THW edition in progress or pending Pro 1600 Edition, but can someone tell me the difference between these 2, because there are a price difference and I know the Bushnell Pro 1600 is the latest version, but I do not see further than the 1600 s. Can someone help me.