Hi Darren, The products are exactly the same but the bundles are brand new. They offer great value for money and ensure that the costly upgrade path has been removed. For example, if a user wanted to buy a High Flow Hotend previously they would have needed to buy a base Revo kit, plus a 60W HeaterCore plus individual HF nozzles. Now they can simply buy a High Flow Revo Hotend. Hope this helps! Thanks, E3D

Hi there, Our new Hotside kits have been curated based on customer feedback and shopping trends. If you're unable to build a suitable kit using our configurator then please note that our Coldside kits are also available as individual products - e3d-online.com/collections/revo-coldsides. You can then pair your Coldside with the relevant HeaterCore (40W/60W) plus individual Revo nozzles specific for your use case. Both HeaterCores and Brass Revo nozzles of all varieties have just had significant price drops too. Thanks, E3D