Trunk comparison: Ford Focus vs Ford Focus Wagon

Summary of the Biggest Differences
The wagon offers significantly more usable cargo space lengthwise: with the seats folded down, the trunk of the wagon is +11.4 in (19%) longer, and with the front seats upright, it is even +10.6 in (35%) longer.
The narrowest point in the cargo area of the wagon is +4.7 in (12%) wider, which makes it easier to accommodate wider items.
In contrast, the regular Focus has a taller trunk opening: the opening height is +3.5 in (13%) greater on the Focus. Also notable is the greater depth (distance from loading edge to trunk floor) of the Focus, which is +6.3 in (800%) deeper than that of the wagon.
What Impact Do These Differences Have on Usability?
More length and width in the wagon mean that longer items and bulkier cargo can be more easily and flatterly accommodated without folding down seats.
This makes the wagon more practical for everyday transport, vacations with lots of luggage, or tradespeople who often carry long parts. The greater minimum width reduces tight spots when sliding in wide boxes or equipment.
The taller trunk opening and greater depth of the Focus affect loading logistics differently: the higher opening height makes it easier to load and unload tall, rather bulky items (e.g., larger boxes or furniture parts), and the deeper floor situation (greater depth) changes the loading geometry—items can be placed further inside and deeper, which lowers the center of gravity but may make lifting in more difficult.
Smaller differences, not considered particularly significant: the loading edge of the Focus is only +2.4 in (10%) higher above the road, and the width of the wagon's trunk opening is +3.1 in (8%) wider; these effects are noticeable but less decisive in everyday use than the differences highlighted above.
In short: Those who regularly carry long or wide cargo clearly benefit from the wagon. Those who more often handle tall/bulky single items or prefer a deeper loading surface may find advantages in the regular Focus.