Choosing model locomotives & rolling stock comes down to two different needs here: do you want one powered diesel locomotive, or a group of freight cars for your consist? The HO Athearn Kansas City Southern SD40-2 and the Micro Trains N Scale Freight Cars Lot Of 6 are close in listed price, but they serve different scales and roles. Pick by railroad format and purpose first; the price gap is secondary.
Quick verdict
Choose the HO Athearn Kansas City Southern SD40-2 Powered Diesel Locomotive KCS #678 if you need a powered HO locomotive with a specific railroad identity. Choose the Micro Trains N Scale Freight Cars Lot Of 6 if your railroad is N scale and your priority is a six-car freight grouping. At USD 61.00 versus USD 64.00, the absolute spread is USD 3, so the job you want the purchase to do should decide this matchup-not the modest price difference.
Listed-price comparison
| Product | Listed price |
|---|---|
| HO Athearn SD40-2 | USD 61.00 |
| Micro Trains N Scale lot | USD 64.00 |
Where each product wins
Where the HO Athearn wins
This locomotive wins for shoppers who specifically want motive power and a named railroad presentation. The title identifies a Kansas City Southern SD40-2, while the description adds white paint, red KCS lettering, road number #678, metal handrails, and roof-fan detail. Its ready-to-go/pre-built status also makes the purchase direction straightforward: it is a locomotive, not a car bundle.
Where Micro Trains wins
Micro Trains wins when the goal is to expand a freight consist in N scale. The lot-of-6 wording gives it a multi-car emphasis, and its attributes identify the type as Freight Car and the condition as New. For a collector or operator who wants several cars for a model railroad, that emphasis is more relevant than a single engine. It is a rolling-stock choice rather than a powered locomotive.
Product notes
HO Athearn Kansas City Southern SD40-2 Powered Diesel Locomotive KCS #678

The HO Athearn SD40-2 makes sense when a powered diesel is the centerpiece of the purchase. Its ready-to-go/pre-built status, six-axle drive trucks, traditional Athearn motor assembly, and horn-hook/knuckle couplers give the model a clearly defined operating setup. The Kansas City Southern road number #678 and white-and-red decoration also give it a specific visual identity rather than a generic locomotive. The limitation is condition: it is listed as Used with a C-5 Good grade, and the original blue box has light shelf wear. That matters when weighing an older model against a new group of freight cars. Choose it for an HO locomotive purchase; the used condition is the clear compromise.
Micro Trains N Scale Freight Cars Lot Of 6

Micro Trains N Scale Freight Cars Lot Of 6 is aimed at a different job. The six-car lot and N-scale format make it a straightforward way to add freight stock to an N-gauge railroad, while the New condition gives it a different starting point from the used Athearn locomotive. The description positions the cars for model railroad collections and freight-train running, with realistic detail and authenticity as part of their appeal. Its limitation is role rather than condition: the listed type is Freight Car, so it adds cars instead of providing powered locomotive movement. Select it when several freight cars are more useful to your consist than one engine.
Final choice by use case
- Choose the HO Athearn SD40-2 for an HO layout needing one powered diesel, especially if Kansas City Southern decoration and a ready-to-go model are central to the brief.
- Choose the Micro Trains N Scale lot for an N-scale layout where a six-car freight addition and New condition are the priority.
- If neither scale is fixed, decide by role first: the Athearn is the locomotive, while Micro Trains is the freight-car lot. That distinction is more useful than simply choosing the lower listed price.