A:Answer Hi Jeff- Thank you for making GE Appliances a part of your home! We know you have choices and appreciate the trust you've placed in us. PEB7227SLSS (new) and PEB7226SFSS are the comparable models. However, you will need to purchase the appropriate trim kit since they are not interchangeable. PEB7227SLSS is compatible with 27" Built-In Kit JX7227SLSS and 30" Built-in Kit JX7230SLSS. Appearance upgrades on this new model include extended window, less noticeable gap between unit and trim, glass touch controls to match most wall oven controls. View Quick Specs: http://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=PEB7227SL_BL_R2_17.pdf - PEB7226SFSS is compatible with 27" Built-In Trim Kit JX7227SFSS and 30" Built-In Trim Kit JX7230SFSS. View Quick Specs:
http://products.geappliances.com/MarketingObjectRetrieval/Dispatcher?RequestType=PDF&Name=240379_peb7226sf_c2.pdf - A trim kit consists of the trim frame, as well as an upper, lower, and rear duct that attaches to and encases the microwave inside the cabinet cut-out so it is important to only use the trim kit designed for that model. Keep in touch. With so many choices, we are always glad to help make your buying decisions a bit easier! SUEatGEA