Carafe and serving
Small glass-pot coffee makers: compare four and five cups
A four- or five-cup maker can be a useful small-pot choice, but the number on the carafe is not a modern mug count. Cuisinart defines its coffee-maker cup as five ounces, so the DCC-450PK's four-cup pot is about 20 ounces and the Soho DCC-5TR's five-cup pot is about 25 ounces. Both brew ground coffee into a separate vessel; neither is a pod-sized fresh cup.
Choose the serving vessel before the finish
The earlier DCC-450PK uses a compact stainless-steel carafe on a warming plate. It does not become a vacuum thermal server just because the pot is metal. The DCC-5TR instead has a glass carafe with marks from two to five cups and a removable water tank. That gives you a little more capacity and a pot you can see through, but glass can break and the heater keeps coffee warm for only 30 minutes. If your required capacity is five manufacturer cups, the DCC-450PK fails that size constraint; if you need to carry coffee without a powered plate, both are the wrong kind of carafe.
The DCC-5TR also has a documented grounds Over Ice recipe: ice goes in the carafe and hot coffee brews into it. Its manual calls for three cups of water, five scoops of coffee, and 15 ice cubes for the five-cup recipe. That is different from ambient-water grounds Cold Brew and different again from a pod Over Ice mode. Pick the exact route you make rather than treating every cold drink as interchangeable.
Minimal controls have consequences
Both are simple grounds brewers without a delayed-start clock. The DCC-5TR adds an integrated measuring scoop, a permanent nylon coffee filter, a charcoal water filter, and a 20-second Brew Pause limit; its manual warns that leaving the pot away longer can let the filter basket overflow. The DCC-450PK has its own short Brew Pause interval and a filter arrangement described in its DCC-450 Series booklet. Neither substitutes for a machine with programmable start, an independently selectable one-to-four-cup setting, or a vacuum carafe. For those needs, compare larger reviewed drip models and check their exact manuals rather than assuming a small pot has the same controls.
Read the individual assessments before considering an older unit: Cuisinart DCC-450PK and Cuisinart Soho DCC-5TR. Both are earlier models; check the exact label, carafe, reservoir, filter basket and working plate on any used example. The DCC-5TR's product page describes a 25-ounce removable tank while the linked booklet diagram labels 26 ounces, so the finder uses the clearly documented five-cup brew rating rather than that conflicting tank figure.