Ulster-bound Ruan Pienaar of the Sharks partners Januarie, now back with the Stormers, at half-back.
He also led the Stormers to South Africa's first-ever Super 12 semi-final three seasons ago.
From what Booth has seen at the Stormers, he thinks the changes will speed up the game.
De Jongh is one of three international debutants and will form an all-Stormers centre pairing with Jaque Fourie.
Springbok centre De Wet Barry scored two of the Stormers' six tries to help them earn a bonus point.
The Highlanders were on the wrong end of a powerful forward display as they lost 46-25 to the Western Stormers.
Meanwhile, Springbok coach Nick Mallett announced that Stormers skipper Corne Krige will replace injured flanker Rassie Erasmus for the second Test.
In Friday's final match, the Western Stormers earned a bonus point in a five-try, 40-18 win over the Coastal Sharks at Newlands.
Booth spent a week with the Stormers in South Africa to see how they are adapting to the changes, which mainly affect the scrum and line-out.
The 24-year-old Stormers player was named world player of the year in 2004 and missed half of the 2006 season after suffering a serious neck injury.
The club is effectively controlled by a South African group, who also have a stake in provincial sides the Sharks and the Stormers in their home country.
Zimbabwean-born Dixon arrived at the Recreation Ground in 2005 from South African side the Stormers and has proved to be good competition for England hooker Lee Mears.
De Villiers is known to be a fan of Western Stormers fly-half Peter Grant, who played for him in last year's Emerging Springbok team when he was coach.
Bekker suffered a foot injury playing for the Stormers in their Super 14 final loss against rival South Africa side the Bulls - captained by Matfield - last Saturday.
But scrum-half Johannes Conradie's reply kickstarted the Stormers' comeback.
There were also injury doubts over Bulls open-side flanker Dewald Potgieter and replacement Juan de Jongh, from the Stormers, and the Springbok management will confirm a revised Test line-up later on Wednesday.
Partly because of last week's Super 14 final between the Bulls and the Stormers, Springboks coach Peter de Villiers opted to give enforced rest to the bulk of his current first-choice players.
With members of the ownership consortium also having controlling stakes in South African Super 14 franchises the Sharks and the Stormers, it is believed some high-profile Springboks have been targeted as possible recruits.
They promptly returned to South Africa and beat the Stormers, their domestic rivals, the following weekend, setting up a meeting with the Chiefs in the final a week later in Hamilton, New Zealand.
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There are also a number of quality lock forwards currently involved in the Super 14 competition, including Bakkies Botha and Johann Muller, while rookie Andries Bekker of the Stormers has also been in good form.
As well as seeing how the ELVs are bedding it, it was also a chance for Booth to catch up with two former London Irish coaches now at Stormers - Brendan Venter and Gary Gold.
Two other Stormers - wing Gio Aplon and blind-side flanker Francois Louw - will also win their first caps, as will replacements Alistair Hargreaves and Bjorn Basson if they come off the bench in the Millennium Stadium.
Saracens are co-owned by a South African consortium with links to provincial sides the Blue Bulls and the Stormers, and there are fears the Guinness Premiership side will become little more than a South African feeder club.
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