ICE 4 is a brand name for long-distance Intercity-Express high-speed trains being procured for Deutsche Bahn.
ICE 4 trainset
Voith ICx front end 'mockup', InnoTrans 2014
ICx 9004 end car en route to the Wegberg-Wildenrath Test and Validation Centre
ICE 3 is a family of high-speed electric multiple unit trains operated by Deutsche Bahn. It currently includes classes 403, 407 and 408 which are additionally specified as ICE 3, New ICE 3 and ICE 3ne
ICE 4
…was specified and DB did not intend to become involved with the design process - both locomotive-hauled trains such as Railjet or variations on the ICE 3 EMU design were considered to be options. The new trains were to be branded ICX and were expected to be similar in aesthetic design to the ICE3 trains…
ICE 3 on the Cologne–Frankfurt high-speed rail line
A now-retired Class 406 trainset
A Siemens Velaro Class 407 trainset