Register for the Rogers forum:
https://communityforums.rogers.com/t5/forums/recentpostspage/post-type/message/node-display-id/category%3AEnglishCommunity
After that, log into the modem, navigate to the STATUS .... DOCSIS WAN tab and copy the entire Downstream overview table, all the way to the last character in the OFDMA section at the bottom of the table. Create a new post in the Rogers forum and paste that data into a post. Ignore the data above the Downstream Overview. We'll start with that.
When you connect directly to the modem, with the modem in Gateway mode, what you get for speedtest results using the
http://speedtest.googlefiber.net/ speedtest. Alternatively you can try the
www.speedtest.net Toronto Vmedia or Montreal Ebox servers.
All things being equal, you should see the same wired speedtest results for both Gateway direct, and Bridge mode thru the router. The choice of speedtest sites and choice of browser are important to the results. Try the speedtests with different browsers just to see what the differences are.