Nugget setup
GE Opal Mini or Mini Pro: choose the tank and footprint
The Opal Mini and Mini Pro share nugget ice and a small countertop appliance format, but the suffixes mark different water packages. GE's exact P4NM20 pages describe the base Mini; P4NM25 pages describe the Mini Pro with a side tank. Those details change the refill and counter routine, not the texture of the ice. The models are earlier products: GE currently labels each exact page no longer manufactured and temporarily out of stock. Check the exact model and package before considering remaining or used stock.
Choose the base Mini for a narrower body
The P4NM20 Mini review covers P4NM20BZLG in Stone Grey and P4NM20AZOG in Charcoal Grey. GE lists an 8.6-inch width for the machine, with manual filling and no included side tank. Its product specification lists nugget ice, SmartHQ Wi-Fi, push-button controls and a removable drawer. The manual has a specific exception for the Charcoal P4NM20AZOG: it does not have an ice-bin light. Do not infer that control detail from the Stone Grey page or from a generic product photo.
The smaller package is not a no-maintenance option. You fill water at the machine, need room above and behind it, and must reach the rear drain. The manual specifies four inches of clearance on both sides and at the back. If your only available counter gap is just wide enough for the body, it is not wide enough for the stated setup clearance.
Choose Mini Pro if the tank saves meaningful trips
The P4NM25 Mini Pro review covers P4NM25QZSS and P4NM25PZSG. Both exact pages list the side tank and touch controls. The Stainless Steel QZSS package includes a stainless scoop; the Stainless Steel/Gray PZSG package includes a plastic scoop. GE gives the side tank as one-half gallon and lists 11.6 inches for the complete package width. The manual describes the tank as hand-wash-only and directs owners to keep it level with the machine and flush it toward the front.
Mini Pro's top-fill funnel can make adding water easier, but a funnel is not an additional tank. If an essential preference is an included upper reservoir, do not let the funnel satisfy it. A side tank trades less frequent filling for more occupied counter area and another part to clean. Confirm that both the tank and its fittings are included with an earlier unit.
Keep production, collection and condition separate
GE advertises up to 36 pounds per day and 1.5 pounds per hour at 70°F ambient and 60°F water; first ice is stated at five minutes. Treat these as manufacturer claims for the stated condition pair. The sources reviewed do not establish a corresponding warm-room rate for these Mini models. A warm-condition minimum therefore should not be marked satisfied from the cool-condition claim.
There is also a meaningful bin-capacity conflict. The product pages say 2 pounds, while the shared multi-model manual lists 2.6 pounds. Since the manual does not resolve these exact suffixes, a hard minimum basket weight remains unknown. Daily production is not the amount stored in one batch. The drawer collects nugget ice and the manual describes meltwater returning to the water path; neither package is a freezer for retaining ice overnight.
Choose based on your actual household routine
Use the Mini when counter width and nugget texture lead, manual refilling is acceptable, and app scheduling is useful but not essential to unattended water supply. Use Mini Pro when the extra half-gallon side tank addresses a real refill burden and the 11.6-inch package plus required clearance fits. In either case, plan cleaning as a recurring water-path task: GE calls for hand-cleaning reservoirs about every three months or when changing the filter, and manual instructions separately describe descaling and rinsing. Cleaning-cycle convenience does not replace those steps.
When choosing among earlier units, confirm the exact P4NM20 or P4NM25 code, finish, light/scoop variant, included drawer and tank, condition, drain parts, and support options. If present-day availability or warranty coverage is important, compare current nugget models rather than assuming a discontinued machine is still sold new. No exact current price or inventory is represented here.