For automotive intercoolers, you will typically see either a plain straight fin or an offset-style fin. These are best explained by images.
As you can see, the offset style fin appears to provide far more surface area for air contact. This arrangement will force air to split numerous times on its path through the core, which amplifies the amount of heat exchange that can occur. Along with improving heat transfer, this will also result in greater pressure loss, which is something that you will need to consider. In general, Mishimoto intercoolers utilize an offset fin to enhance the exchange of heat as much as possible.

https://engineering.mishimoto.com/2015/04/drop-intake-temper...

The ETS GT-R Street Intercooler has interally offset and staggered fins so as charge air passes through the intercooler it's forced to split multiple times which results in cooler intake air temps.

http://sdmotorworks.com/product.sc?productId=1751

Geregelte und gegebenenfalls gestufte Abgasturboaufladung in Verbindung mit intensiver Kühlung der Ladeluft und des zurückgeführten Abgases werden dabei nicht nur die klassische Rolle bei der Leistungs-, Drehmoment- und Nenndrehzahlsteigerung übernehmen, sondern auch entscheidend zur Verringerung des Kraftstoffverbrauchs und der Schadstoffemissionen beitragen.
vda.de
Controlled and in certain cases even staggered exhaust turbocharging in combination with intensive inter-cooling and the recirculation of exhaust gases will not only take over the classical functions of enhancing performance, torque and nominal rotation speed, but will also contribute decisively to the reduction in fuel consumption and in the emission of noxious gases.
vda.de
:
Die geregelte und gegebenenfalls gestufte Abgasturboaufladung in Verbindung mit intensiver Kühlung der Ladeluft und des zurückgeführten Abgases wird dabei nicht nur die klassische Rolle bei der Leistungs-, Drehmomentund Nenndrehzahlsteigerung übernehmen, sondern auch entscheidend zur Verringerung von Kraftstoffverbrauch und Schadstoffemissionen beitragen.
vda.de
Controlled and where possible staged exhaust gas turbo charging, in combination with intensive cooling of the charge air and the returned exhaust gasses, will not take on the classical role of providing performance, torque or nominal speed improvements, but rather decisively contribute to reducing fuel consumption and pollutant emissions.
vda.de
http://www.linguee.de/deutsch-englisch/search?source=auto&qu...

The engine (1) has a two-stage turbocharger system. The inlet air (23) passes through a low-pressure compressor (17) driven directly (12) by a low-pressure turbine (16), and through a high-pressure compressor (14) driven (15) by two separate high-pressure turbines (13a/b). There are air coolers (26,27) before and after the high-pressure compressor.
:
[0049] Of course, the invention is not limited solely to a two-stage turbocharger trained, but can rather, on three or expand staged turbochargers.
https://www.google.ch/patents/EP1375868A1?cl=en

The term "n gestufter Ausführung2 can be parphrased by "staged intercooler kit".